Drive arrangement for twisting machines with spindles arranged on both sides



' 1934- w. LENK -DRIVE ARRANGEMENT FOR TWISTING MACHINES WITH SPINDLES ARRANGED ON BOTH SIDES Filed Sept 30 1932 Patented Dec. 4, 1934 DRIVE ARRANGEMENT FOR TWISTING MACHINES wrrn SPINDLES ARRANGED ON BOTH SIDES Wilhelm Lenk, Remscheid-Lennep, Germany, assignor to Barmer Maschinenfabrik Aktiengesellschaft, Mohrenstrasse, Wuppertal-Oberbarmen, Germany Application September 30, 1932, Serial No. 635,588 In Germany December 17, 1931 7 Claims.

This invention relates to a drive arrangement for twisting machines with spindles arranged on both sides driven-by a single endless belt.

In'the drive arrangements of known structure the belt running along the spindles is, for example, pressed by small stretching rollers against the spindle wharves in order to efiect the drive of the spindles. It has already been proposed, to arrange belt guide pulleys between the spindles 10 over each of which pulleys both the pulling and also the pulled belt bight runs. These belt guide pulleys are, however, mounted stationary in the interior of the machine.

,The known arrangements are open to the ob- 115 jection, that the pressure for pressing the belt against the wharves of the individual spindles is not uniform, so that difierences occur in the revolving speeds of the spindles and have a detrimental effect on the thread. In order to over- 20, come this objection it has been proposed to mount the spindles themselves so that they can be oscillated and bear against the belt with a pressure as uniformly as possible. This construction is, however, extremely complicated and considerably increases the cost of production of the twisting machines.

The above-mentioned objections are overcome by the drive arrangement according to the invention. The object is not only to simplify the 80 machine construction, but further to ensure a uniform speed of rotation of the spindles by equalizing the belt pressure against the spindles. The invention consists in that, transversely to the belt path, movably mounted belt guides are arranged, on each of which both the pulley and also the pulled belt bight runs. It is advisable to arrange movably mounted belt guide pulleys as belt guides. Each pulley is preferably mounted on. a guide element shiftable on a bar.

*0 It is, however, also possible to arrange each belt guide pulley oscillatable on a lever.

Moreover, the same effect may be obtained by providing a system of two or more belt guide pulleys as belt guides. The belt guide pulleys .45 may be mounted on a common guide element, some on the side of the pulling belt bight and some on the-side of the pulled belt bight. It is also possible toarrange the belt guide pulleys f oscillatable'on levers, which are connected in I pairs to form a hingedrectangle the pulleys on the pulling and those on the pulled belt bight being always opposite one another. When employing a system of two or more belt guide pulleys, it is advisable to provide a positive driving connec- 65 'tion between the pulleys bearing against the pulling bight and those, bearing against the pulled bight of each system, which connection may be effected, for example, by toothed wheels.

It is further advantageous in the case of the arrangement of a slidable element to construct the guide of this slidable element in the form of T-grooves or slots in order to thus prevent a lateral tilting or lifting of the individual belt guides. Moreover, the guide bar may be made of self-lubricating non-metallic material to avoid lubrication.

From the invention the advantage is derived that, owing to the movable belt guides, the belt on both sides is pressed with uniform pressure against the wharves of the spindles, so that a uniform revolving speed is attained for all spindles, resulting in a uniform thread. Further, this arrangement is characterized by special simplicity, so that the construction of such twisting machines is not made more expensive.

Several embodiments of the invention are illustrated by way of example in the accompanying drawing, in which:-

Fig. 1 shows the drive arrangement in elevation.

Fig. 2 is a top plan view of Fig. 1.

Fig. 3 shows a single belt guide pulley with bearing foot in section, but on a large scale.

Figs. 4 to 7 show in top plan view modified forms of construction.

On the spindle rails 1 and 2 on the one side and on the other side, rows of spindles 3 and 4 are arranged which are driven by an endless belt 5. According to Figs. 1 to 3 a belt guide pulley 6 is arranged as belt guide between every four spindles and mounted by means of a bolt 7 in a slidable element 8 loosely guided on a bar'9 connecting the two spindle rails 1 and 2. It is advisable to construct the guide in T-groove form or as a slot guide 10.

In Fig. 4 the pulley 6 serving as belt guide is oscillatably mounted on a lever 11. In Fig. 5 two pulleys 6 and 6 mounted on a common slidable element and serving asbelt guide are provided, over which pulleys the pulling belt bight runs on one side and the pulled belt bight on the other side. The slidable element 8 is again slidable on the bar 9. Fig. 6 shows the pulleys 6 and 6 serving as belt guide oscillatably mounted on two levers 11 and 11' interconnected by a connecting rod, 12. When employing several pulleys as belt guide, it is advisable to interconnect same by a positive driving connection in order to obtain always uniform rotation of the pulleys from the pulling to the pulled bight.

and 15 as illustrated in Fig. 7.

A constant pressure of the belt on'the wharves oi the spindles on both sides of the machine is attained in all forms of construction, so that a uniform revolving speed and consequently a uniform thread is obtained. Moreover, it only one belt guide pulley is arranged, the bearing pressure occurring on both sides or the pulley is neutralized.

I claim:

1. A spindle drive for double-sided twisting machines, comprising in combination two rows of spindles, an endless belt bearing against the inner side of said spindles, guides between the two opposite runs of said belt adapted to contact the inner faces of said belt runs and maintain said belt in contact with both rows of spindles and to move transversely relatively to the running direction of said belt to equalize the tension in the two runs of said belt.

2. In a spindle drive as specified in claim 1 the guides each comprising a fixed bar,. a slidable element on said bar, and a pulley on said element bearing against both runs of the belt.

3. In a spindle drive as specified in claim 1- the guides each comprising a fixed bar, a slidable element .on said bar, and two pulleys mounted This may be eflected by toothed wheels 13, 14

side by side on said element and each bearing against one run of the belt.

4. In a spindle drive as specified in claim 1 the guides each comprising two levers pivotally mounted between the runs of the belt, two guide pulleys one carried by each of said levers and bearing each against one run of the belt, and a rod connecting said pulleys.

5. In a spindle drive as specified in claim 1 the guides each comprising a bar, an element slidable on said bar, two pulleys mounted side by side on said element and each bearing against one run of the belt, and a positive driving connection between said pulleys.

6. In a spindle drive as specified in claim 1 the guides each comprising a bar of self-lubricating non-metalic material, an element slidably mounted on said bar, and a guide pulley carried by said element bearing against the two runs of the belt.

7. In a spindle drive as specified in claim 1 the guides each comprising a bar of sell-lubricating non-metallic material, an element slidably mounted on said bar, and two guide pulleys arranged side by side on said element and bearing each against one run of the belt.

WILHEIM LEN'K. 

